JPH0620437U - Glassware molding equipment - Google Patents

Abstract

(57) [Abstract] [Purpose] Eliminates the need for air cylinders, associated valve blocks and large volumes of expensive compressed air sources to provide accurate and programmable motion control associated with each part of the glassware forming equipment. To do. [Structure] Individual functional component control device 22, 24, 26, 2
8, 30, 32, 34 are connected between the electronic control unit 17 and one or more digitally responsive motors 13 to operate the motors independently. Drive signal supply means 53, 54, 55, 56, 60, 62, 64, 6
6, 68 supplies a drive signal to the motor, and within the range of the motion envelope stored in the individual functional component control device, 1
One or more parts 21, 23, 25, 27, 2
Move 9, 31, 33.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to electronic control of glassware molding machines, and more particularly to precise and programmable control of at least some components of an individual section glassware molding machine.

[0002]

[Prior art]

 A typical glass product molding machine has a plurality of individual sections, and these individual sections perform the same action only at different stages. Each single section comprises a plurality of periodically moving components that are pneumatically operated to carry out each step of the glassware forming process. Although the basic glass product forming process has changed very little over the last few decades, highly sophisticated control systems have evolved to control the performance of these glass product forming processes. This will increase production speed, increase reliability, reduce waste, improve tolerances of manufactured products, and increase the speed with which glass molding machines can be assembled in response to job changes. I was able to make it bigger.

One feature that all single-section glassware forming machines have in common is that the pneumatically actuated components are typically associated with a plurality of associated valves arranged in a valve block. To be controlled. The operation of the valves in this valve block is typically accomplished by a mechanical timing drum driven in synchronism with a gob feed mechanism. Each protruding cam member is located within the annular groove on the surface of the mechanical timing drum and mechanically cooperates with the valve to start and stop each movement. The relative timing between each event in the mechanical cycle is adjusted by the relative position of each cam member within the annular groove. For a basic description of such a glass product molding machine, US Patent No. 1,911, issued May 23, 1933, invented by H. W. Ingle. 119.

Electronic sequencing of the components of a glassware molding machine is currently underway. For a description of electronically controlled glassware forming machines, see U.S. Pat. Kwitkowski and Wood (both assigned to the applicant with the present invention). In summary, in an electronically controlled glassware forming machine, the operating signal is generated by an electronic control device to selectively energize and deenergize the solenoid valve to produce the glassware. Performs timed operations of the components that perform the molding process. Such an electronic control unit precisely defines each time during the cycle in which the valve is operated and facilitates slight adjustments at such times. When a job changes, the timing of almost all components is completely changed, but such a job change can be responded to quickly and easily.

A more sophisticated and modern controller works in the same way as the controller described above, but uses a digital computer to further enhance the operator's interface to the glassware forming machine, and others. Supplies various useful characteristics of. Although glassware forming technology has been greatly facilitated by such equipment, the major limitation of such equipment is that such equipment produces an operating or non-operating signal at a given time during the cycle. It can only be provided. Such devices have no control action as to the actual motion envelope of each component.

As will be appreciated by those skilled in the art of this type, in the process of making an acceptable glass product, some steps in which the movement of the components of the glass product forming machine must be precisely controlled. There is. Moreover, the desired movement of such components may be varied by the job. For example, the fall of the parison from the side of the material to the side of the mold must be accomplished smoothly at a given rate, or else the accelerating force applied to the parison will cause the soft glass to deform. Larger glassware requires slower speeds due to greater centrifugal forces, and changing jobs from smaller glassware to larger glassware requires changes in the speed of the components making the return stroke. And

Presently, motion envelopes are controlled to a considerable extent by damping of each air cylinder and by controlling the flow of air from the air cylinders in the exhaust stroke of the air cylinders to limit their speed of motion. . One of the speed control methods is performed within the valve block. By energizing the solenoid valve, air can be extended by passing air through the one-way check valve in the valve block towards the air cylinder. When the solenoid valve is de-energized and the component returns to its original position, the one-way check valve closes and air is forced through the adjustable needle valve in the valve block. The needle valve can be adjusted to limit the flow of air from the air cylinder during the exhaust stroke and correspondingly limit the velocity of the air cylinder. Many components of the glassware forming machine are operated via double-acting cylinders. The velocity of such components is also affected by the air pressure communicating with the needle valve. One example of the construction of the valve block suitable for electronic control is described in US Pat. No. 4,293,004 to Lowe, which is referred to for the description of the present invention. Cited as a document. This U.S. patent is assigned to the applicant with the present invention. A novel approach to regulating air pressure in an air cylinder and regulating air flow or exhaust is illustrated in Figure 1 of the Roue US Patent.

The valve blocks and other similar devices described in the Rowe US patent relating to the respective damping and electronic control of each air cylinder provide a great deal of control over the motion envelope of a given component. However, such valve blocks and similar devices suffer from a number of drawbacks. Any changes in the range of motion of the components must still be adjusted in the glass product molding machine, even if this change rarely occurs. Electronic controls and valve blocks can only start and stop the supply of air, limiting the inflow of air into the air cylinder and the outflow of air from the air cylinder.

The acceleration, deceleration and speed of the components must be adjusted by trial and error in the field. Job changes that require changes in component motion envelopes require a great deal of experimentation by the manufacturer. It is often desirable to work with unfiltered air because of the large airflow required, even when using a single glassware molding machine. I. S. In a typical machine operation, various condensates from compressors, cylinder oils, sludges and varnishes are drawn into the air line. Such debris may ruin the fine adjustment of the needle valve, which requires constant adjustment of the speed by the operator for some critical components.

Perhaps most importantly, the precise control of the motion envelope of at least some of the more critical components of the glassware molding machine further increases production rate and results in wasted or manufactured defects. It is believed that it is possible to further reduce the number of containers and perhaps open a breakthrough in substandard container technology.

[0011]

[Summary of device]

 According to the invention, it is proposed to precisely control the motion envelope of at least some of the components that carry out the critical steps of the glassware forming process. According to the present invention, it is possible to reliably control the timing, acceleration, speed and deceleration of desired components in a glass product molding machine within negligible tolerances. In the preferred embodiment of the present invention, the need for all the air cylinders, associated valve blocks and large volumes of expensive compressed air sources of typical glassware forming machines can be eliminated.

According to the present invention, in its broadest aspect, an accurate and program for at least one periodically movable component of a glass forming machine that performs a critical step in the glass product forming process. Possible motion control can be performed. The desired components are driven by a digitally responsive motor. The motor is controlled by an electronic controller, preferably of the digital microcomputer type, which provides an input to the motor according to a stored ramping function. Movement of certain components is described in U.S. Pat. No. Re. Reissued May 23, 1978, invented by Kwiatkowski and Wood. No. 29,642, which is incorporated herein by reference. No. 29,642 is cited in the description of the invention as a reference.

Therefore, it is an object of the present invention to provide precise control over the kinetic envelope of the components of a glassware molding machine that perform the critical steps in the glassware molding process.

Another object of the present invention is to provide complete repeatability of the desired motion envelope.

Another object of the present invention is to remotely control changes in air cushions of components.

Another object of the present invention is programmable control of the motion envelope of selected components of a glassware molding machine, which control is derived from the origin of past fine-tuned jobs. Is to reduce the failure time for job changes.

Another object of the present invention is to reduce the air volume requirements and noise of a typical glassware plant.

Another object of the present invention is to ensure that critical components do not rely on precise control of air pressure and exhaust.

It is another object of the present invention that the operator must perform a critical component of the glass forming machine due to changes in air pressure and ambient temperature and wear of each air cylinder. Is to eliminate the adjustment.

Although the present invention covers many different embodiments, one embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Of course, the description of this one embodiment does not limit the principle of the present invention.

[0022]

【Example】

 FIG. 1 shows the relationship between the device of the present invention and a conventional electronic control device. A simple block, a diagram. Although various types of electronic controls can be used to control the glass forming machine, the preferred embodiment of the present invention uses a part control unit for each part of the glass product forming machine, which is Kwiatkowski. ) And Wood, U.S. Pat. No. Re. 29,642, which are hereby incorporated by reference.

As mentioned above, the electronic control unit used in the present invention, despite various special designs, sends an activation signal to the valve, which is all actuated by an energizing or deactivating solenoid, to allow various individual component devices to operate. The start of the movement of the element is accurately performed.

FIG. 1 shows such a basic block and make-up. The electronic control unit 17, operator control 15 [I. S. Change the timing of the machine and control its start / stop], central console 18 and mass storage device 19 [control programming and / or data supply to electronic control unit 17], pulse generator 16 [glassware molding machine Providing timing signals to the electronic control unit 17 in synchronism with the movement of certain elements (including plungers, shears, molten glass distributors).

FIG. 2 diagrammatically shows the individual parts of the glass product molding machine in which the present invention is used. This part is designated by 11 in its entirety but is equipped with a number of components driven by a digitally responding motor (hereinafter referred to as a digital response motor) 13 rather than a conventional fluid pressure cylinder. Here, the digital response motor includes an analog motor which is finally digitally controlled. For example, of the series servo type or of the variable frequency AC type, which sends a gradual voltage level to the motor and then uses normal feedback control to zero the motor to the new input level. .

The elements of the part are shown diagrammatically and include a blank mold 21, a funnel 23, a baffle 25, an invert / revert mechanism 27, a blow mold 29, a blow head 31, and an ejection arm 33. The mechanical association between each digital response motor 13 and the various components is shown schematically by dashed line 14. These are standard, well known to those skilled in the art, and may include rack and pinion drives, cams, direct connections to rotating parts, gearboxes, and various other mechanical connections.

The glass product molding machine having these various parts includes various other parts such as a thimble and a plunger depending on the model of the glass product molding machine and special operating conditions. These variations are well known to those skilled in the art, and it will be apparent to those of ordinary skill in the art that such other components may be precisely controlled by the present invention.

Molten glass is fed from the melting furnace into separate parts via mechanical plungers, shears and distributors (generally designated 20 in FIG. 2). In glassware molding machines, a set of these parts is often used for 6 to 12 parts. It is tuned to the plunger and shears via a separate partial pulse generator 16 [Fig. 1]. The pulse generator may be of the axial encoder type or of various other types, providing tuning of the individual parts and other parts of the glassware forming machine.

In the preferred embodiment, a plurality of part controllers or individual function micro-computers, one for each digital response motor, are provided to help control the motion envelope of the particular part of the glass product molding machine. . 1 and 2, each component or individual function microcomputer is shown in a separate block and is leveled according to the component whose operation (of the component) is to be controlled. That is, a separate function microcomputer for controlling the motion envelope of a separate blank mold is indicated by 22, 24 for the funnel, 26 for the baffle, 28 for the invert / revert device, 30 for the blow mold, 30 for the blow head. 32, for the extraction arm is shown at 34.

The conventional partial electronic control unit 17 is connected to each partial controller and sends a signal to start the movement of the various parts of the glass product forming machine. This sub-control unit is programmable and receives data from the central console 18 [Fig. 1] indicating the relative start times of the various parts. And it has mass storage devices such as floppy disks or tape drives. The individual function microcomputer is also preferably connected to the central console 18. Each individual function micro computer has sufficient memory for each control program and data, and can send a drive signal to a digital response motor to give a predetermined motion envelope to a target part.

FIG. 5 diagrammatically shows the separate connections of the individual function microcomputers 26, 28 and their digitally responsive motors 13, such as stepper motors (in the preferred embodiment). The individual function microcomputer of FIG. 5 is provided with three data tables 60, 62 and 64, which are respectively labeled (in that order) as a lamp table X, a lamp table Y and a rotation table. The individual function microcomputer also includes a CPU 56, an output port 66, an address pointer X53, an address pointer Y54, and a rotation pointer 55.

Input to the discrete function microcomputer is received via lines 35, 36, 37 from a conventional electronic control unit [such as 17 in FIG. 1]. Since such conventional electronic control units are generally designed to provide a 24V output to the solenoid valve, the optical decoupling circuit 38 is, in part, to separate this 24V actuation signal from the 5V computer input. , And also to prevent interference from electrical noise spikes.

As will be described later, some of the individual function microcomputers of the present invention that receive two inputs from the conventional electronic control unit [for example, in the case of the individual function microcomputer 28] also receive only one input. There is also one [for the individual function microcomputer 26].

The digital response motor 13 is connected to the output side of the individual function microcomputer. In the preferred embodiment, as shown in FIG. 5, four individual coil windings 47A, 47B, 47C ,. 47D, each of which uses a stepper motor which is separately energized by drive transistors QA, QB, QC, QD. This stepper motor may actually form a group of four coil windings electrically represented as above by connecting multiple coils in series. The drive transistor is energized by the output from the individual function microcomputer via the optical isolation circuit 39.

As will be apparent to those skilled in the art, implementations in the hardware of a discrete function microcomputer can take various forms. For example, some or all of the data tables and pointers could be located outside the actual microcomputer. It is also possible to equip the present invention with a large number of different logic chips.

Input from the flip-flop latch circuit 76 shown in the above-mentioned US Pat. No. Re. 29,642, particularly FIG. 3 and FIG. , 36 and 37 can be induced. These latch circuits are set when an activation signal is sent from the electronic control unit to a component. When the latch circuit is set, it produces a continuous electrical signal of + 24V, which activates a solenoid operated fluid valve in the glassware molding machine of the present invention. The latch circuit is reset when a deactivation signal is sent to the component from the electronic control unit. When the latch circuit is reset, the signal is turned off, the solenoid operated fluid valve returns to its closed position and the air supply to the cylinder is stopped.

Although the preferred embodiment of the present invention uses a stepper motor, those skilled in the art will appreciate that a synchronous motor and various frequency drive means could be used, or closed loop feedback control could be utilized. It is also possible to implement the present invention using a servo motor.

An example of a DC servo motor control system suitable for use in the present invention is shown in FIG. The set point counter 72 is incremented or decremented under the program control of the associated individual function microcomputer. The setpoint counter then outputs a new binary count to the D / A converter 73, which in turn outputs the analog voltage levels representing them to the power operational amplifier 75. . The power steering amplifier 75 then drives the DC servomotor 78 in the appropriate direction to change the analog feedback signal from the absolute position sensor 76 until it equals the analog output of the D / A converter. The absolute position sensor 76 is connected to a mechanical component 80, which is driven by a DC servomotor 78 via mechanical coupling means 79.

An example of an AC motor control system suitable for use in the present invention is shown in FIG. The increment or decrement of the set point counter 83 and the setting or resetting of the motor rotation direction flip-flop are program-controlled by an associated individual function microcomputer. The setpoint counter then outputs a new binary count to the D / A converter 84, which in turn outputs the analog voltage levels representing them to the operational amplifier 85. The operational amplifier 85 then drives the voltage / frequency converter 86. The rectangular wave output from the voltage / frequency converter 86 is then converted into a pseudo sine wave using the rectangular wave / sine wave converter 87. Next, the pseudo sine wave is amplified by the power amplifier circuit 90 and sent to the rotor winding of the AC motor 91.

The pseudo sine wave is also sent to the field winding of the AC motor 91. The signal sent to the field winding is either in phase with the signal to the rotor winding, or 180 degrees out of phase, depending on the state of the motor direction flip-flop 88. This determines the direction of rotation of the AC motor. The motor drives the mechanical component 92 via the mechanical coupling means 93 until the absolute position sensor 94 produces a feedback signal equal to the output of the D / A converter 84.

The operation of the stepper motor used in the preferred embodiment of the present invention will be described with reference to the rotary table of FIG. 4 and the stepper motor circuit diagram of FIG. The values of the transistor driver Q 1 are shown in different directions in the table of FIG. 4 with respect to the clockwise rotation CW and the counterclockwise rotation CCW of the stepper motor.

For example, if the final position of the stepper motor is the result of energizing the driver according to row A of FIG. 4, ie, drivers QA and QC are energized and drivers QB and QD are deenergized. , The counterclockwise rotation step is caused by the driver bias according to row A + 3, while the clockwise rotation step is caused by the driver bias according to row A + 1. Therefore, it can be seen that the individual function microcomputer can be controlled by appropriately energizing the four drivers.

At present, various types of stepper motors having various shapes including an electric hydraulic stepping motor and an electric hydraulic stepping cylinder are used. These motors are capable of producing torques in excess of 2000 inches-pounds with splits in excess of 400 steps / rev and speeds in excess of 2000 RPM. Cylinders that are substantially interchangeable with the hydraulic cylinders currently in use by the present invention are from a wide range of stroke lengths with 0.0005 inch step splits and 300 inch / min speeds. Available by choosing. It should be noted that the field of stepper motors is advancing rapidly and new breakthrough products often appear on the market.

The data tables shown in FIGS. 3a and 3b are for controlling the operation of an N-step digital response motor according to the program described below. Digital Response Each step of motor actuation is assigned two 8-bit words in the data table. The first bit of each word indicates whether the actuation should be started or ended, or should be rotated clockwise or counterclockwise.

For example, if the first bit of each 8-bit word is 0, as indicated by the word labeled X in the ramp table (X) and the word labeled Y + N + 1 in the ramp table (Y), then the individual function micro The computer understands that it is the start of the working envelope. Also, if the first bit of each word is 1, then the individual function micro-computer will have an operating envelope as shown in word X + N + 1 of the ramp table (X) and word Y of the "function off" lamp table (Y). Stopping the stepper motor after understanding that it has finished. The direction of rotation of the step is indicated by placing a 1 in the appropriate first bit of the two words. As can be seen from Figures 3a and 3b, when a 1 is placed in the first decit of the first word, the rotation is clockwise, whereas when a 1 is placed in the first decit of the second word, the rotation is in the counterclockwise direction. is there.

The remaining 14 bits of the two words that define a single step of operation are used to represent a 14-bit binarization number. These bits are referred to as "rate bits" and determine the time period before the individual function microcomputer begins the next operating step, as will become clearer in the description of FIG. 6 below. To do. This is accomplished by cycling the microcomputer the number of times indicated by the 14-bit number before reading the next two 8-bit words and performing the next step.

It should be noted that the two data tables Ramp Table (X) and Ramp Table (Y) are complementary to each other and are designed to be combined. That is, the ramp table (X) controls the operation of the part in its first motion mode. The ramp table (Y) controls the movement of the part in a second motion mode that returns it to its original position. In a preferred embodiment of the invention, it is envisaged that each movement mode has the same number of steps.

Therefore, in the movement in the first movement mode, when the X table pointer is incremented, the Y table pointer is incremented. The data labeled X in the ramp table (X) indicates the start position of the stepper motor, while the data labeled Y in the ramp table (Y) indicates the end of the second motion mode. Similarly, data labeled X + 1 on the ramp table (X) controls the first step of the first motion mode, while data labeled Y + 1 on the ramp table (Y) controls the final step of the second motion mode. To do.

As will be appreciated from the above, using the ramp table to control the operating state of the component ensures precise control of motion, velocity and acceleration. Typically, the first step has a relatively large proportion of bits. The following steps have a number of bits whose absolute value decreases continuously, which accelerates the part until it reaches maximum velocity in the middle of the motion mode. The percentage bit number then begins to increase in absolute value, which slows down the part until each ramp table ends and the part stops. The ramp table allows a detailed design of the working envelope of various parts in a repeatable manner.

As will be understood by those skilled in the art, the program shown in the flowchart of FIG. 6 is designed to be applicable to the electronic partial control unit used in the present invention. As mentioned above, the control unit typically operates by turning on and off various solenoid valves that provide pressurization of the hydraulic cylinders that drive the parts in the glassware forming machine. Some parts in the glassware forming machine, such as the funnel, baffle and blow head, are driven one way and then returned by a spring or other means. With these parts, the electronic control unit used in the present invention energizes the solenoid to initiate the first motion mode. The solenoid remains energized until the appropriate time during the glass forming cycle to return the part to its original position in the second motion mode. At that time the solenoid is de-energized and the part is returned to its original position by mechanical means outside the control of the electronic control unit.

The other parts, such as the invert / revert arm, the blank mold, the blow mold and the eject arm are driven in one direction and then also by the use of a second hydraulic cylinder or a two-way actuated hydraulic cylinder. It is returned to the position of and. The invert / revert arm is typically driven in two directions. For example, in the machine of the present invention, the electronic control unit energizes the solenoid to pressurize the cylinder that moves the invert / revert arm in the invert mode.

The electronic control unit is timed to turn off the solenoid after ending the invert mode. The second solenoid is then energized at an appropriate point during the glass molding cycle, and the second cylinder is pressurized by returning the original position by driving the invert / revert arm in the revert mode. Then after reaching the revert position, turn off the second solenoid. There may be an overlap between the disengagement of the first solenoid and the energization of the second solenoid to maintain positive control of the invert / revert arm.

It is of course possible to specifically design the control system so that the individual function microcomputer is simply started up and, if a problem occurs, the individual function microcomputer is further communicated with. However, in order to make the present invention applicable to existing controllers, it is necessary to utilize existing signals from the electronic control unit to various solenoid valves. These signals exist as long as each part remains active. Most electronic control units have a means of stopping the machine immediately when a problem occurs. Therefore, in the present invention, the presence of each solenoid energizing signal from the electronic control unit is tested and if this signal is stopped, the present invention causes each component to be stopped immediately.

FIG. 6 shows a simple flow chart which can be used to control the individual function microcomputer according to the present invention. This specific program is designed to control the individual function microcomputer 28 for controlling the invert / revert arm shown in FIG. 1, but it is desired to perform periodic operation and control over the entire cycle. It can be used to control any other such component. With a slight modification described below, this program can also be used to control components such as baffles and funnels that are currently in electronic control only in first mode operation.

This program is started by "start" and immediately enters the question "inverted signal presence & absence of revert signal" to test the input lines 35 and 36 of the individual function microcomputer 28 shown in FIG. These signals are individually activated by the partial control unit 17 shown in FIGS. 1 and 2 at appropriate times during the cycle as described in U.S. Pat. No. Re. 29,642. It is output to the computer. Assuming the test result is positive, ie, the invert signal is present and the revert signal is not, this indicates that the glassware molding machine is at some point during the invert mode. Then enter the question "End of Table X" to test whether the invert mode has ended.

When the address pointer X53 in the individual function microcomputer 28 indicates the end of the table X, the question "revert signal present & invert signal nonexistent" is entered and the input lines 35 and 36 of the individual function microcomputer 28 are turned on again. test. If the electronic control unit has not yet reached the appropriate time to start revert mode during the cycle, the program will be restarted from "Start" and proceed through the above.

Since the present invention is designed to be applicable to existing electronic control units, the above features of this program cause the electronic control unit to affect parts for an indefinite time after the completion of the invert mode. The invert signal can be continuously output without giving it. This is also how the prior art hydraulic cylinders operate when fully extended and under pressure.

When it is indicated that the table X is not finished with respect to the question "end of table X", the instruction "increment pointers X and Y" is executed, and the address pointer X53 and the address pointer Y54 are changed to the table X. And Y to the next position. Next, the instruction "table X circular subroutine execution" is executed. The circulation subroutine is shown in FIGS. FIG. 8 shows a subroutine for the stepper motor shown in the above preferred embodiment, and FIG. 9 shows a subroutine for the DC servo motor or the AC variable frequency motor described above in connection with FIGS. 10 and 11, respectively. Both circulation subroutines first test against the question "CW bit in Table X".

The CPU then issues an indication to determine if there is a 1 in the first digit of the first word in Table X pointed to by address pointer X. According to the result of this test, the instruction "Setpoint counter increment" or "Setpoint counter decrement" is executed in the DC or AC digital response motor system (Fig. 9), and the instruction "A pointer increment in circulation table". Alternatively, "A pointer decrement in circulation table" is executed in the stepper motor shown in the preferred embodiment (FIG. 8).

The circular pointer 55 in the discrete function microcomputer 28 is then incremented or decremented appropriately to indicate the proper activation of the drive transistor 47 for the proper direction of circulation shown in FIG. For the stepper motor circulation subroutine shown in FIG. 8, the instruction “move to A if the pointer is at A + 4” is executed for timewise rotation, and the instruction “pointer is A for counterclockwise rotation”. If it is −1, move to A + 1 ”is executed.

These instructions cause the circular pointer to be redirected to the proper position in the table no matter which end of the circular table it reaches. Next, the instruction "send data designated in the circulation table to the motor" is executed, and the drive transistors QA and QB are output from the output port 66 [Fig. 5] of the individual function microcomputer 28 through the optical separation circuit 39. , QC and QD output the appropriate data resulting in the stepper motor coils 47A, 47B, 47C and 47D being energized for the desired cyclic step actuation.

Next, the digital response motor operates through a single step of circulation, and reaches the instruction “R (Table X) times of loop” in the main program. R (Table X) is the number of bits in the individual function microcomputer 28 designated by the address pointer X53 in Table X. With this instruction, loop circulation continues until the number of loops becomes equal to R (Table X), while performing a test to determine whether the invert signal is still present and the revert signal is not present for each loop. Done. The program then returns to "start" and runs again.

The above instruction to loop the number of times indicated by the rate bits delays the speed of the digital response motor by delaying the execution of the next step for a desired time period indicated by the magnitude of the numbers that make up the rate bits. Provide a way to control.

The program continues to run until Table X is complete and invert mode operation is complete. The test is carried out continuously until the partial control unit 17 outputs the revert signal and turns off the invert signal to the individual function microcomputer 28 on the lines 35 and 36. Next, the question "Presence of revert signal & absence of invert signal" is affirmed, and the program proceeds to the question "End of table Y". When table Y ends, the program is restarted from "start", as indicated by a 1 in the first digit of each of the two words occupying the Y position in the data table.

Assuming the first mode operation is complete and table X is at the end of memory location X + N + 1 shown in FIG. 3, table Y is about to begin the first step operation in revert mode. Q: "End of table Y" is denied and the program proceeds to the instruction "Decrease pointers X and Y". This results in a set of instructions being executed, and the address pointer X and address pointer Y are decremented to the respective data positions X + N and Y + N shown in FIG.

Next, the instruction “execute table Y circulation subroutine” is executed. As a result, the instruction "table X circular subroutine execution" and each of the instructions described above with reference to FIGS. 8 and 9 are executed, except that the question "CW bit in table X" is executed for table Y. To be done. That is, this question is asked for the first bit of the first word pointed to by address pointer Y rather than address pointer X. No further explanation is necessary for this subroutine.

After the execution of the circulation subroutine, the question “revert signal present & no invert signal present” is tested again to see if the electronic partial control unit 17 is still sending a signal indicating that the revert condition is still present. Establish. If the revert condition continues, the question "R (table Y) loops" is tested in the same manner as described above for question "R (table X) loops". However, the data of R (Table Y) is from the data position indicated by the address pointer Y in Table Y. The program returns to the "start" position and is executed again.

If for some reason it is desired to deactivate the invert / revert arm, the operator need only press the appropriate stop button on the prior art electronic control unit. As a result, the signal to the invert state is cut off and the digital response motor module stops. Both the ramp table (X) and the ramp table (Y) ensure that the arm is returned to its initial invert position by applying the revert condition even when the invert / revert arm needs to be stopped during its movement. Are connected to each other.

Individual function microcomputers that control components such as funnels and baffles, that is, components that are currently driven in one direction and returned by other mechanical means outside the control of the electronic control unit, include, for example, baffle signals. It works similarly, except that only tests that determine whether or not it is done are performed. As long as the baffle signal is present, the discrete function microcomputer keeps the digital response motor running and drives the baffle according to the ramp table (X).

Conversely, if the baffle signal is not present, the discrete function microcomputer understands that it is desired to return the baffle to its initial position and activates the baffle according to the ramp table (Y). When the baffle activation signal is stopped due to an emergency stop, the individual function microcomputer simulates the current return by other mechanical means when the air pressure to the cylinder that operates the baffle is cut off, and the ramp table (Y) Follow to return the baffle to its original position. A simple flow chart for controlling the baffle and other single mode parts is shown in FIG.

In all individual parts and glass product forming machines, the periodic movement of the parts and the glass feed to the glass product forming machine must be synchronized. This synchronization is often accomplished using a conventional shaft encoder that outputs 360 digital signals per revolution of the appropriate shaft on a glass product molding machine. Other synchronization methods are equally applicable to the present invention. For example, a method of driving a feeder and a glass product forming machine with a synchronous motor through an inverter and using a signal from the inverter to synchronize control of the glass product forming part is also included.

In order to allow the present invention to be easily adapted to a variety of different types of glassware without changing all the percentage bits, the discrete function microcomputer can be used with any of the existing synchronization means. But you can combine them. For example, glass molding machines operate much slower for large glass products than for smaller glass products.

The operation of the various parts must also be slow. According to the invention, this is also achieved by changing the lamp table (X) and the lamp table (Y) globally for different sized glass products and providing different rate bits. It can also be done by changing the loop speed that determines the time period for.

As the speed of the glassware forming machine increases, the time for a single loop, ie the time given to a single rate bit, can be reduced. This can be easily accomplished by setting the loop speed with reference to the time between pulses from the pulse generator or other synchronization means.

To go to a subroutine which interrupts the program on a frequency basis between the two rising edges of two pulses, eg from a pulse generator or other synchronization means, and increments a binary counter during the interrupt, an interrupt timer 68 [Fig. 5] can be provided.

This binary counter will display the frequency of the pulse generator. This binary counter can be used to represent the frequency of the loop routine in the main program for the rate bits. For example, when molding large glassware and the machine speed is relatively slow, the time interval between pulses from the pulse generator is relatively long. A binary counter activated by the interrupt timer subroutine counts a relatively large number of numbers between pulses.

The number stored in the binary counter is used to represent the relatively low frequency of the portion of the loop in the program. This indicates the timed number for the loop with a percentage bit. A direct bond is thus obtained between the machine speed and the various part speeds, and an optimum X or Y data table can be obtained which is used to carry out various glass product productions at different speeds.

It is also possible that each individual function microcomputer is provided with several separate data tables and these are appropriately selected by the central controller. Different data tables can be used for starting and stopping the machine and / or for emergency stop of the machine.

In the high speed production of some glass products, current controllers have shown that in emergency or other situations in which the delivery of actuation signals is stopped even when the part is in the center of the flow line. , It may be desirable to gradually slow down certain parts and stop them. In the preferred embodiment of the invention described above, the component is deactivated as soon as the activation signal from the electronic control unit is no longer received.

When the part is currently under single mode electronic control, according to the invention, in addition to immediately stopping the operation of the part when the activation signal is stopped, The direction can be reversed immediately. The extra acceleration experienced by glassware in parts and components during such transitions may be unacceptable under certain conditions.

This can be easily avoided by testing for the percentage number of bits shown at each instant when such a transition begins. If the number is greater than the predetermined safety index, the part can be safely stopped. This is because a relatively high ratio bit rate of the index means low speed.

If the percentage bit number is less than the predetermined safety index, then a subroutine for incrementing the current number by a predetermined amount is used to obtain the predetermined safety index allocation bit. Step through each increment until the component slowly decelerates.

This subroutine also stores the steps required to bring the stop to a stop and when the stop or turn is initiated, the part can be returned to the last indicated step in the table. The subroutine can also increment the ramp table without using the data so that the indicated word in the rate table corresponds to the proper rest position of the part.

A similar subroutine can be used any time the movement of the part is started from a position other than the start position of the appropriate ratio table, eg after an emergency stop. Immediately after receiving the activation signal, a test is performed to determine if the indicated percentage bit is less than a predetermined safety index. If the number is greater than the predetermined safety index, the movement of the part is started according to the ramp chart.

If the number is less than a predetermined safety index, then an initial calculation is performed that defines the number of steps required to safely achieve the speed corresponding to the indicated rate bits. The part is then driven in the reverse direction for the number of steps thus defined and, under control, is gradually accelerated in the correct direction and returned to the appropriate step in the ramp chart.

In its broadest concept, the present invention relates to a device for precisely controlling the movement of at least one component in a glassware forming machine. The part is mechanically coupled to the digital response motor and data corresponding to the desired motion of the part is placed in the first storage means, the movement of the part being effected by the storage means and the part controller coupled to said digital response motor. Control.

According to a preferred embodiment, said data consist of a ramp table with a data set provided for each increment of movement of the part, each data set being an indication of the direction of movement of the part, Includes whether the part is at the beginning or end of the flow line, and the time limit for incremental movement of the part. By coupling the time period defined by the data set to the machine speed, a further improvement is obtained in that the optimum data table for the part can be utilized over different machine speeds.

A further improvement is the removal of excess acceleration of parts during emergency shutdowns of glassware forming machines. According to a preferred embodiment, the present invention can be applied with a slight modification to the majority of electronic controllers currently available for the glassware manufacturing industry.

[Brief description of drawings]

FIG. 1 is a block diagram of a conventional electronic control system interface associated with the present invention.

FIG. 2 is an existing I.V. with most of the components driven by a digitally responsive motor in accordance with the present invention.
S. It is a schematic diagram of a machine.

FIG. 3 illustrates a data table used in accordance with one embodiment of the present invention. a shows the function on-ramp table (X), and b shows the function on-ramp table (Y).

FIG. 4 is a rotary table required to drive the stepper-motor of the preferred embodiment of the present invention.

FIG. 5 is a stepper that can be used in the preferred embodiment of the present invention.
FIG. 3 is a schematic diagram of a single function microcomputer connected to an electric motor.

FIG. 6 is a flow chart illustrating a method of operating each function microcomputer using the present invention in which control of both modes of motion of a component is performed by a conventional electronic controller.

FIG. 7 is a flow chart illustrating a method of operating a single function microcomputer using the present invention in which only a single mode of control of a component is controlled by a conventional electronic controller.

FIG. 8 is a flowchart illustrating a subroutine for controlling the direction of a stepper-motor when implementing the flowcharts of FIGS. 6 and 7.

9 is a digitally responsive D.P.I. implementation of the flowcharts of FIGS. 6 and 7. FIG. C. Or A. C. 6 is a flow chart illustrating a subroutine for controlling the direction of a motor.

FIG. 10 is a diagram illustrating a D.D. which can be used as a digitally responding motor according to the present invention. C. It is a block diagram of a servo motor system.

FIG. 11 is a schematic diagram of an A.A. C. It is a block diagram of a servo motor system.

[Explanation of symbols]

11 Glass Product Molding Machine 13 Motor 17 Electronic Control Unit 21, 23, 25, 27, 29, 31, 33 Parts 22, 24, 26, 28, 30, 32, 34 Individual Function Parts Control Device 53, 54, 55, 56 , 60, 62, 64, 66, 6
8 Drive signal supply means

Claims (5)

[Scope of utility model registration request] 1. (a) A plurality of parts (21, 23, 25,
27, 29, 31, 33) and one or one when molding glass gobs into glass products.
A glassware molding machine (11) having one or more digitally responsive motors (13) for moving one or more said parts; (b) said digitally responsive motors (13) ) Is supplied to the component (21, 23, 25, 27,
29, 31, 33) for moving the electronic control unit (17), wherein the electronic control unit (17) includes a data storage device,
One or more individual functional component control devices in a glass product forming apparatus, which is provided with a central processing unit for storing, retrieving and generating operation signals for the digitally responsive motor (13). (22,2
4, 26, 28, 30, 32, 34) between said electronic control unit (17) and said one or more digitally responsive motors (13), said one Alternatively, each of the one or more individual functional component controllers receives an individual functional operation signal from the electronic control unit (17), and the one or more individual functional component controllers (22, 24, 26, 28, 30, 32, 34) within the range of the motion envelope stored therein, said one or more parts (21, 23, 25, 27, 29, 31, 33).
Drive signal supply means (5) for supplying a drive signal to the digitally responsive motor (13) so as to move
3,54,55,56,60,62,64,66,6
8) The glass product forming apparatus characterized by comprising: 2. The one or more individual functional component control devices (22, 24, 26, 28, 30, 32, 34).
To each of the digitally responsive motors (1
Storage means (60, 62, 6) for storing data relating to the direction and rate of movement of one of the digitally responsive motors (13) within a plurality of increments of time of operation 3).
4) The glass product forming apparatus according to claim 1, further comprising: 3. The one or more individual functional component control devices (22, 24, 26, 28, 30, 32, 3).
4) a first storage means (60) for storing a first data table corresponding to a desired first motion envelope of the part from a first position to a second position; Second storage means (62) for storing a second data table corresponding to a desired second motion envelope of the part from a position to the first position, wherein the first data table is Data identifying the relative time between unit movements of the digitally responsive motor, the identification locations for each unit movement of the digitally responsive motor,
The glass product molding apparatus according to claim 1, further comprising: data for displaying a direction of the unit movement. 4. The one or more individual functional component control devices (22, 24, 26, 28, 30, 32, 3).
4) changing the real time effective coefficient of the data indicating the relative time between the unit movements of the digitally responding motor in proportion to the change in the speed of the glass product molding machine, Means responsive to molding machine speed (56,6
0, 62, 64, 68), The glass product forming apparatus according to claim 1, wherein 5. The individual functional component control device (22, 2)
4,26,28,30,32,34), during the execution of the emergency stop, test the speed of each of the parts,
Emergency stop means (56, 6) for uniformly decelerating and accelerating the respective parts until the speed of the respective parts exceeds a predetermined speed.
0, 62, 64).
Glassware forming equipment.